The Taisho era (1912 - 1926), a short period in Japanese history which saw the continued evolution of Westernisation and social/political change of the Meiji era. Exceptions for dates can be made for alt. history games (e.g. Devil Summoner: Raidou Kuzunoha) and will be marked with the year they take place.

My list on Heian period games: https://www.backloggd.com/u/Ophelia/list/heian-japan-games-794---1185/
My list on Kamakura period games: https://www.backloggd.com/u/Ophelia/list/kamakura-japan-games-1185---1333/
My list on Bakumatsu era games: https://www.backloggd.com/u/Ophelia/list/bakumatsu-japan-games-1853---1868/
My list on Meiji era games: https://www.backloggd.com/u/Ophelia/list/meiji-japan-games-1868---1912/
My list on Showa era games: https://www.backloggd.com/u/Ophelia/list/showa-japan-games-1926---1989/